JEE Chemistry Polymers MCQs Set 07

Chemistry Objective Questions and Answers: Polymers

Explore reliable objective questions for Polymers tailored for JEE learners. Utilizing these Chemistry multiple-choice formats ensures thorough preparation and strengthens problem-solving speed for upcoming school assessments.

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View or download the dedicated Polymers MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Chemistry evaluations.

Multiple Choice Questions

Question 1: Which of the following is a chain growth polymer?
(a) nylon-66
(b) bakelite
(c) terylene
(d) teflon
Show Answer & Explanation

Answer: (d) teflon

Explanation:
1. Teflon is formed from CF2=CF2 by a chain reaction.

Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.

Question 2: Which of the following is a synthetic rubber?
(a) Buna-S
(b) neoprene
(c) both Buna-S and neoprene
(d) none of these
Show Answer & Explanation

Answer: (c) both Buna-S and neoprene

Explanation:
1. Both are man-made elastomers.

Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.

Question 3: Which of the following is a linear polymer?
(a) nylons
(b) bakelite
(c) low density polythene
(d) melamine-formaldehyde polymer
Show Answer & Explanation

Answer: (a) nylons

Explanation:
1. Nylons have long unbranched chains.
2. Bakelite and melamine resin are cross-linked and low density polythene is branched.

Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.

Question 4: Which of the following is not an example of a natural polymer?
(a) wool
(b) silk
(c) leather
(d) nylon
Show Answer & Explanation

Answer: (d) nylon

Explanation:
1. Nylon is a synthetic polyamide.

Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.

Question 5: Which of the following is a chain growth polymer?
(a) nylon-6
(b) dacron
(c) glyptal
(d) polypropylene
Show Answer & Explanation

Answer: (d) polypropylene

Explanation:
1. Polypropylene forms from propene by a chain reaction.
2. The others form by step growth.

Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.

Question 6: Natural rubber is a
(a) polyester
(b) polyamide
(c) polyisoprene
(d) polysaccharide
Show Answer & Explanation

Answer: (c) polyisoprene

Explanation:
1. It is made of isoprene units.

Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.

Question 7: Which of the following is not a synthetic polymer?
(a) polyethylene
(b) PVC
(c) nylon
(d) cellophane
Show Answer & Explanation

Answer: (d) cellophane

Explanation:
1. Cellophane is regenerated cellulose, made from a natural polymer.

Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.

Question 8: Nylon-66 is a
(a) natural polymer
(b) condensation polymer
(c) addition polymer
(d) substitution polymer
Show Answer & Explanation

Answer: (b) condensation polymer

Explanation:
1. It forms from adipic acid and hexamethylenediamine with loss of water.

Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.

Question 9: Which of the following is a condensation polymer?
(a) PVC
(b) teflon
(c) dacron
(d) polystyrene
Show Answer & Explanation

Answer: (c) dacron

Explanation:
1. Dacron forms from terephthalic acid and ethylene glycol with loss of water.

Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.

Question 10: Which of the following is not a natural polymer?
(a) cellulose
(b) protein
(c) PVC
(d) nucleic acid
Show Answer & Explanation

Answer: (c) PVC

Explanation:
1. PVC is synthetic.

Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.

Question 11: Which of the following statements about terylene is not correct?
(a) it is a step-growth polymer
(b) it is a synthetic fibre
(c) it is a condensation polymer
(d) it is a thermosetting plastic
Show Answer & Explanation

Answer: (d) it is a thermosetting plastic

Explanation:
1. Terylene is a polyester fibre that melts on heating, so it is thermoplastic and not thermosetting.
2. The other three statements are true.

Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.

Question 12: Which of the following is not a polymer?
(a) sucrose
(b) an enzyme
(c) starch
(d) teflon
Show Answer & Explanation

Answer: (a) sucrose

Explanation:
1. Sucrose is a disaccharide of two monosaccharide units.
2. Enzymes (proteins), starch and teflon are polymers.

Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.

Question 13: In the polymer -[CH2-C(YZ)]n-, a syndiotactic arrangement is one in which
(a) all Y groups lie on one side of the chain and all Z groups on the other side
(b) the Y and Z groups lie alternately on each side of the chain
(c) the Y and Z groups are arranged randomly
(d) Y and Z are the same group
Show Answer & Explanation

Answer: (b) the Y and Z groups lie alternately on each side of the chain

Explanation:
1. Syndiotactic means that the substituents alternate regularly from one side of the chain to the other.
2. All on one side is isotactic and random is atactic.

Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.

Question 14: Polymers of the type Z-Mn-Y, which contain a foreign group at the ends in addition to the repeating unit, are known as
(a) semisynthetic polymers
(b) atactic polymers
(c) telomers
(d) plasticisers
Show Answer & Explanation

Answer: (c) telomers

Explanation:
1. Low molecular mass polymers with end groups from a chain-transfer agent are called telomers.

Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.

Question 15: In natural rubber (caoutchouc) the isoprene units are joined
(a) head-to-head
(b) tail-to-tail
(c) head-to-tail
(d) in all these ways
Show Answer & Explanation

Answer: (c) head-to-tail

Explanation:
1. Steric effects make 1,4-head-to-tail joining the regular arrangement in natural rubber.

Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.

Question 16: Polymerisation of glycol with dicarboxylic acids is
(a) addition polymerisation
(b) condensation polymerisation
(c) telomerisation
(d) any of these
Show Answer & Explanation

Answer: (b) condensation polymerisation

Explanation:
1. Ester links form with loss of water, so it is a condensation (step-growth) polymerisation.

Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.

Question 17: The plastics which are hard become soft and readily workable by the addition of certain compounds called
(a) catalysts
(b) telomers
(c) plasticisers
(d) vulcanisers
Show Answer & Explanation

Answer: (c) plasticisers

Explanation:
1. Plasticisers (high-boiling esters) weaken forces between chains and soften a plastic.

Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.

Question 18: Alkyd resins are condensation polymers obtained from dibasic acids and
(a) phenol
(b) glycol
(c) glycerol
(d) formaldehyde
Show Answer & Explanation

Answer: (c) glycerol

Explanation:
1. Glyptal, an alkyd resin, is made from glycerol and phthalic acid.

Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.

Question 19: Celluloid is
(a) a thermoplastic material obtained from caprolactam and urea
(b) a thermoplastic material obtained from cellulose nitrate and camphor
(c) a thermosetting material obtained from urea and formaldehyde
(d) a thermosetting material obtained from glycerol and phthalic anhydride
Show Answer & Explanation

Answer: (b) a thermoplastic material obtained from cellulose nitrate and camphor

Explanation:
1. Celluloid is cellulose nitrate plasticised with camphor and it softens on heating.

Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.

Question 20: The product of an addition polymerisation reaction is
(a) PVC
(b) nylon
(c) terylene
(d) a polyamide
Show Answer & Explanation

Answer: (a) PVC

Explanation:
1. PVC forms from vinyl chloride by addition.
2. Nylon, terylene and polyamides form by condensation.

Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.

Question 21: Complete hydrolysis of cellulose gives
(a) D-fructose
(b) D-ribose
(c) D-glucose
(d) L-glucose
Show Answer & Explanation

Answer: (c) D-glucose

Explanation:
1. Cellulose is a polymer of beta-D-glucose.

Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.

Question 22: Which of the following can be polymerised to polythene?
(a) ethylene
(b) ethylene chlorohydrin
(c) ethyl acetate
(d) ethyl methyl ketone
Show Answer & Explanation

Answer: (a) ethylene

Explanation:
1. Polythene is the polymer of ethene (ethylene).

Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.

Question 23: Polypropylene can be obtained by the polymerisation of
(a) CH≡CH
(b) CH2=CH2
(c) CH3-CH=CH2
(d) CH3-C≡CH
Show Answer & Explanation

Answer: (c) CH3-CH=CH2

Explanation:
1. Propene CH3-CH=CH2 gives polypropylene.

Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.

Question 24: When heated with zinc chloride, lactide forms a linear polymer which may be
(a) polystyrene
(b) a polyamide
(c) a polyester
(d) polythene
Show Answer & Explanation

Answer: (c) a polyester

Explanation:
1. Lactide is the cyclic diester of lactic acid, and ring opening gives polylactic acid, a polyester.

Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.

Question 25: Which of the following has been used in the manufacture of non-inflammable photographic films?
(a) cellulose nitrate
(b) cellulose acetate
(c) cellulose xanthate
(d) cellulose perchlorate
Show Answer & Explanation

Answer: (b) cellulose acetate

Explanation:
1. Cellulose nitrate is highly inflammable, so cellulose acetate is used for safety film.

Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.

Question 26: Phenol-formaldehyde resins are formed by polymerisation of phenol and formaldehyde by
(a) addition polymerisation
(b) condensation polymerisation
(c) both addition and condensation polymerisation
(d) none of these
Show Answer & Explanation

Answer: (b) condensation polymerisation

Explanation:
1. Water is eliminated at each methylene bridge, so it is condensation polymerisation.

Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.

Question 27: PVC is obtained by polymerisation of
(a) CH2=CH-CH2-Cl
(b) CH2=CH-Cl
(c) CH3-Cl
(d) CH3-CHCl2
Show Answer & Explanation

Answer: (b) CH2=CH-Cl

Explanation:
1. PVC is poly(vinyl chloride), from chloroethene CH2=CHCl.

Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.

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FAQs

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